Solved

digital data transmission and reception

Posted on 2009-07-08
3
381 Views
Last Modified: 2012-05-07
Hi -

(XP embedded PC)
I am trying to monitor and set various digital inputs and outputs within an electromechanical machine.

I am at present, using 8 port digital input output boards connected together via an RS485 link.
I have around 60 outputs and 30 inputs which I wish to set and monitor within a short space of time. (around 5mS)
My problem is that the serial data transmission and consequent reception from each board takes far too long. I know I could attach a GPIO device to my PC (XP embedded) and instantly send and receive, but I wish to use some sort of shift register system (similar to boundary scan devices).
Is there any such animal commmercially available?
Chris
0
Comment
Question by:chrislock
  • 2
3 Comments
 
LVL 63

Expert Comment

by:btan
ID: 24829540
You want to consider serial to Ethernet (for speed) and Multiplexer (for time division) for analysis.
0
 

Author Comment

by:chrislock
ID: 24829828
Thanks for the thought, but I was thinking of some sort of very simple and inexpensive system - the complications of ethernet and mux systems are a definite overkill for a relatively small amount of digital I/o over a small distance.
Chris
0
 
LVL 63

Accepted Solution

by:
btan earned 500 total points
ID: 24830984
maybe this open project can help.
it has the s/w & h/w schematics. also using shift register.

http://users.skynet.be/DCI_Site/dcibus_e.html
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

This paper addresses the security of Sennheiser DECT Contact Center and Office (CC&O) headsets. It describes the DECT security chain comprised of “Pairing”, “Per Call Authentication” and “Encryption”, which are all part of the standard DECT protocol.
A clone is a duplicate copy. Sheep have been cloned and maybe someday even people will be cloned, but disk cloning (performed by the hard drive cloning software) is a vital tool used to manage and protect data. Let’s look at what hard drive cloning …
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.
Finds all prime numbers in a range requested and places them in a public primes() array. I've demostrated a template size of 30 (2 * 3 * 5) but larger templates can be built such 210  (2 * 3 * 5 * 7) or 2310  (2 * 3 * 5 * 7 * 11). The larger templa…

831 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question